If you use clear the position and do not save it at all, and then move/size the main mIRC window to where you want it, exit, and re-run mIRC, does it open up in the same place?
When a specific position is not saved, mIRC will always open up where it was last located when it exited.
For clarification, I am trying to save the position in the bottom left of Display 2 (My right monitor).
I tried what you suggested here and it opened in the same place as before, which is in the bottom left of Display 1.
If this does not work: if you move mIRC to the main display and try to save the position, does that work?
Yes this works.
